has five judges. Two specialized courts within administrative agencies have been established, the Court of Tax Review hears disputes involving illegal taxes levied by county and city governments, and the Workers’ Compensation Court. The nine-justice Oklahoma Supreme Court is the court of last resort for all civil appeals. The Court has appellate jurisdiction on all civil issues, the Court of Civil Appeals, the Court of Tax Review and the Worker's Compensation Court. The Court only has original jurisdiction when new first impression issues, or important issues of law, or matters of great public interest are at stake. Within the Oklahoma court system there are two independent courts: the Oklahoma Court on the Judiciary which monitors the actions of all judges and justices and the Oklahoma Court of Impeachment, which is the Oklahoma Senate sitting, which acts serves as the only court that can remove the highest levels of state government officials from their offices. Federal court cases are heard in the United States District Court for the Eastern District of Oklahoma based in Muskogee, the United States District Court for the Northern District of Oklahoma based in Tulsa, and the United States District Court for the Western District of Oklahoma based in Oklahoma City. Appeals are heard by the United States Court of Appeals for the Tenth Circuit based in Denver, Colorado. Federal representation Oklahoma's two U.S. Senators, Republicans James Lankford and Markwayne Mullin, are elected at-large, serving since 2015 and 2023, respectively. Oklahoma is currently represented by five congressional districts in the United States House of Representatives. At one point, Oklahoma had as many as eight congressional districts and as many as three at-large districts, but the state's sluggish population growth resulted in the state losing its seventh and eighth districts in 1953 and its sixth district in 2003. Oklahoma's 1st congressional district is based in Tulsa and covers the northeastern corner of the state and it borders Kansas to the north. It is represented by Kevin Hern, a Republican. Oklahoma's 2nd congressional district covers (approximately) the eastern one-fourth of the state, bordering Kansas to the north, Missouri and Arkansas to the east, and Texas along the Red River to the south. It is represented by Josh Brecheen, a Republican. Oklahoma's 3rd congressional district covers western Oklahoma, from the Panhandle to the Tulsa suburbs, and borders New Mexico to the west, Colorado and Kansas to the north, and the